Entirely subjective take here. CBPs can be jerks. But what you perceived as intimidation, may have been an interview with a bad CBP.
We hear your frustration. You sound like you're looking to be mad about something, or have your side of the story approached with validating words. In this community you will receive honesty, even if it's cutting and perceptively brutal. I've learned it's key to accepting that the K1 visa process pulls no punches either. You two will get eaten alive at every turn if you continue to see yourselves as victims through this. Immigration is hard, and even sometimes risky. As mean and unaccommodating as officers can be, USCIS and Customs Protection do not owe someone entry to this country. Vetting is normal, and sometimes none too fair.